Typewriting machine



April 21, 1931. J. LINDBURG TYPEWRITING MACHINE Filed March 5, 1925 r m m m machine-frame, showing the same attached Patented Apr. 21, 1931 UNITED STATES PATENT OFFICE JOSEPH LINDBURG, OF BROOKLYN, NEW YORK, ASSIGNOR TO UNDERWOOD ELLIOTT FISHER COMPANY, OF NEW YORK, N. Y., A CORPORATION OF DELAWARE TYPEWRITING MACHINE Application filed March 5, 1925.

This invention relates to means for securing a typewriting machine to a baseboard, whiph may be the drop leaf of a typewriteres One of the features of this invention is the provision of means whereby the typewriting machine, having headed studs fast to the frame, may be attached to a baseboard by inserting the heads of the studs into key-hole 19 slots in supporting brackets fast to the baseboard by sliding the machine on the baseboard to force the shanks of the studs into the narrow portions of the key-hole slots, and by positively locking the studs into the slots to prevent accidental displacement of the machine.

In order to attach the machine to the baseboard, the heads of the studs on the machineframe are inserted in the large portions of the key-hole slots in the brackets. The machine is then slid rearwardly to bring the holding studs into the smaller portions of the keyhole slots, whereupon locking springs, which are fast to the brackets, snap up to their normal positions in front of the heads of the studs, thus locking the machine in position on the baseboard.

When it is desired to remove the machine from the baseboard, the locking springs are depressed to clear the heads of the studs and the machine may then be separated from the baseboard by sliding the machine forwardly, thus bringing the heads of the studs in line with the large portions of the key-hole slots.

Other features and advantages will hereinafter appear.

In the accompanying drawing,

Figure 1 is a diagrammatic side view, in elevation, of an Underwood typewritingto a baseboard.

Figure 2 is a cross-sectional view, in elevation, of the locking device, showing the locking spring in its released position.

Figure 3 is a plan view, showing the supporting brackets fast to the baseboard and the studs therein shown in cross-section.

Figure 4 is a perspective view of the locking device, dismembered to show the outline of the component parts.

Serial No. 13,220.

A typewriting machine, which it is desired to fasten to a baseboard and to lock it thereto, is lowered on the board, so that the heads of the studs 11 which are fast to the frame 12 of the machine will enter the larger portion of key-hole shaped apertures 14 in plates 15 which are fast to the board 10 by means of screws 16. Then the machine is slid forwardly on its feet 17, and the bodies of the studs 11 will engage the narrow portions 18 0f the apertures 14: which are substantially the same size as the bodies of the screws. Upon reaching the ends of said narrow portions the heads 13 of the studs 11 will clear locking springs 19 which are fast to the plates 15 by means of rivets 20, and the springs will snap to their normal position as shown in Figure 1, thus interposing the heads of the studs and consequently locking the studs in the narrow portions of the apertures.

When it is desired to separate the machine from its supporting base, the springs 19 are depressed to a position as shown in Figure 2 by means of thumb-piece extensions 21 which project out of the plates 15. Then, while holding down the springs 19 with the thumbs, the machine is pulled forwardly by gripping the frame of the machine to a position where the heads of the studs 11 will i be in line with the larger portions of the apertures 14. Then the machine may be lifted ofi the baseboard.

One of the features of this device is its inexpensive manufacture, and with this end in view the plates 15 are designed to be blanked out, then pierced and formed to the required shape. As shown in the drawing, the plates comprise a flat top 22 into which a key-holeshaped aperture is pierced and to which the 3 locking springs 19 are fast through holes 23. The fiat top 22 extends downwardly at 24 to raise said top above the baseboard, to clear the heads of the screws, and the downwardlyextending sides terminate in outwardly-extending cars 25, which are provided with holes 26 for receiving the screws 16 to fasten the plates to the baseboard.

The locking springs 19 may also be blanked out of flat stock, and, to increase their resiliency, are provided with two nicks 27, thus reducing the cross-section at the bending point, and with holes 28 in line with the holes 23 in the plates 15.

In order to provide a close adjustment between the several parts and at the same time eliminate the necessity of building the parts within narrow mamifacturing limits, the studsll are screwed into the frame of the machine at 29, and are provided with locknuts 30, so that the studs may be set atthe desired position, and then locked against ac cidental displacement.

The typewriter-feet 17 are commonly used for subduing the noise of operation, being for this purpose commonly made of yielding material, generally soft rubber. Owing to the weight and vibration of the machine, these soft feet usually flatten down in use, so that the machine itself sets much closer to the table 10. But the use of the stud ll avoids trouble from such settling of the machine due to long use. The stud is of a length to accommodate the settling of the machine, and will effect the locked attachment of the machine to thetable at all heights at which the machine may stand, equally as well when the machine is old, as when it is new, the stud having snfiicient length or shank for this purpose.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I claim:

1. In a typewriting machine having a frame, rubber feet. and a baseboard, the combination with studs adjustably mounted under said frame, each stud having a i ank provided with a head at its downwardlyextending end, of means for attaching said typewriting machine to the baseboard, said means including plates fast to the baseboard, said plates having keyhole-shaped apertures therein whereby the head of each stud may be passed through the larger portion of the aperture and the shank of the stud may be passed into the narrow portion thereof to lock the machine, and impa ble means whereby the shanks may be positively bolted in the narrow portions of the apertures to prevent possibility of accidental displacement of the machine on the baseboard, said last-mentioned means including spring leaves fast to the plates underlying the larger portion of the aperture, said spring leaves being yieldable to allow the passage of the head of each stud through the larger portion of the aperture and each resilient to return to its normal position against the shank when the stud is slid into the narrow portion of the aperture, to serve as an impassable interceptor in the path of the shank, to prevent the return of the shank into the larger portion of the aperture, each of said spring leaves being provided with a thumb-piece extension to render it manually removable from said path to release the shanks and permit detachment of the machine from the baseboard, said shank bein of a gr alt length suflicient to :IM'UHHUOtlzltt ostant-ial settling of the machine in use, and to permit the described locking engagement at substantially different heights of the machine due to changes in conditions and age of the usual supporting feet of the machine.

2. In a typewriting machine having a frame and a baseboard, the combination with studs adjustably mounted under said frame, each stud having a head at its dmvnwardlyextendinf, end, of means for attaching said typewriting machine to the baf-zeboard, said means including plates fast to the baseboard. each plate having a l-;ey-hole-shaped aperture therein, whereby the head of the stud may be passed through the larger portion of the aperture and the shank of the stud then nasscd into the narrow portion thereof to lock the machine, and means whereby the studs may be inn as-sably bolted in the narrow portion of the aperture to prevent possibility of accidental displacement of the machine on the baseboard, said last-mentioned aeans including a 21in extending below the larger portion of the aperture and terminating short of the smaller end of the aperture, said spring being) Jieldable to allow the downward insertion of the stud through the larger portion of the aperture and resilient to return to normal position to interlock with said shank when said stud is moved into the smallcr end of said aperture. said spring thereby providing a, non-yieldin;; impassable lockin the path of said stud to prevent possibility of forward displacement of the machine, said shank being of a great length sui'licient to accon'nnodate substantial settling of the machine in use, and to permit the described locking engagement at substantially different heights of the machine due to changes in conditions and of the usual supporting feet of the machine.

3. In a ty 'iewriting machine having a frame and a baseboard, the combination with studs adiustably mounted under said frame, each stud having a head at its downwardlyextending end, of means for attaching said typewriting machine to the baseboard, said means including plates fast to the baseboard, each plate having a key-hole-shapcd aperture therein, whereby the head of the stud may be passed through the larger portion of the aperture and the shank of the stud then passed into the narrow portion thereof to lock the machine, and means whereby each stud may be impassably bolted in the narrow portion of the aperture to prevent accidental displacement of the machine on the baseboard, said last-n'ientioned means including a spring extending below the larger portion of the aperture and terminating short of the smaller end of the aperture, said spring being yieldable to allow-the downward insertion of the stud through the larger portion of the aperture and resilient to return to normal position in the path of said stud when said stud is moved into the smaller end of said aperture, said spring thereby providing a non-yielding impassable interceptor for said stud to prevent possibility of forward displacement of the machine, said spring being attached to said plate at one side of the longitudinal axis of said key-hole-shaped aperture, and engageable with said shank at diflerent elevations of the machine, said shank being of a great length suiiicient to accommodate substantial settling of the machine in use, and to permit the described locking engagement at substantially different heights of the machine due to changes in conditions and age of the usual supporting feet of the machine.

4. In a typewriting machine provided with a baseboard, the combination with a headed shank forming a stud fast to the frame of the machine, of a substantially U-shaped plate having a key-hole slot to receive said stud, said plate being fast to the baseboard, and means for locking the shank into the narrow portion of the slot, said means including a manually-releasable spring-lock fastto the plate and extending under the larger portion of the slot in said plate, said lock being yieldable when the head of the stud is thrust through the larger portion of the slot and designed to spring in front of the shank when the shank is slid into the narrow portion of the slot, and form an impassable intercepting bolt to prevent the shank from moving out of said narrow portion, at substantial variation in the height of the machine, said shank being of a great length suiiicient to accommodate substantial settling of the machine in use, and to permit the described locking engagement at substantially different heights of the machine due to changes in conditions and age of the usual supporting feet of the machine.

JOSEPH LINDBURG. 

